Lifting apparatus for gasless laparoscopic surgery

Abstract

A lifting apparatus of surgery comprises a vertical post, a horizontal arm, a rack slider and a vertical rack. One end of vertical post is mounted on a surgical table; and the other end is to be slid on and pivoted by the horizontal arm. The horizontal arm includes a hole to slide and pivot on vertical post, a shaft to be slid on by rack slider and a fastening means to secure horizontal arm on vertical post. The rack slider includes a hole to slide on a shaft of horizontal arm, and a lifting mechanism to engage with vertical rack. The vertical rack includes a rack to engage with lifting mechanism of rack slider and an adaptor to couple with a distension instrument. First clamp vertical post on a surgical table. Then slide and secure horizontal arm on vertical post to desired position. Following slide rack slider on horizontal arm to desired position such as above patient's abdominal wall. Then, engage rack slider with vertical rack to provide upward lifting by turning the handle of lifting mechanism on rack slider.

We claim: 
     
       1. A lifting apparatus of surgery comprising:
 a vertical post; 
 a horizontal arm; 
 a rack slider; and 
 a vertical rack; 
 said vertical post with one end to be mounted on a surgical table and the other end to be slid on and pivoted by the horizontal arm; 
 said horizontal arm including a hole, a shaft and a fastening means, wherein the hole of the horizontal arm can slide and pivot on the vertical post, the shaft of the horizontal arm can be slid on by the rack slider and the fastening means of the horizontal arm can secure the horizontal arm on the vertical post; 
 said rack slider including a hole, and a lifting mechanism, wherein the hole of the rack slider can slide on the shaft of the horizontal arm and the lifting mechanism of the rack slider can engage with the vertical rack, said lifting mechanism comprising a handle, a pivot, two extending pins, a disc, a pinion hole and a rack slot, said handle mounted on one end of the pivot to be rotated by handle, two extending pins on the other end of pivot, which spaced at a proper distance and attached to the disc, to engage with the vertical rack, whereby upon rotating handle to engage extending pins with the vertical rack to form a rack and pinion system; and 
 said vertical rack including a rack and an adaptor, wherein the rack of the vertical rack can engage with the lifting mechanism of the rack slider and the adaptor of the vertical rack can couple with an instrument; 
 whereby clamping the vertical post on the surgical table, sliding and securing the horizontal arm on the vertical post to desired position, sliding the rack slider on the horizontal arm to desired position above a patient's abdominal wall, engaging the rack slider with the vertical rack, and raising the vertical rack to provide lifting by turning the handle of the lifting mechanism on the rack slider; 
 
       wherein said fastening means comprising:
 a holding base capable of sliding or rotating on a rod; 
 a driving bolt rotatably engageable in the holding base; 
 a thrusting block rotatably coupled with the driving bolt and reciprocatively held in the holding base; and 
 a follower block engageable with the thrusting block and reciprocatively moving in the holding base; 
 said holding base including: a rod hole longitudinally formed in the holding base to be slidably engageable with the rod about a longitudinal axis (X); a first block hole transversely formed in the holding base about a first latitudinal axis (Y) projectively perpendicular to the longitudinal axis (X); a screw hole formed in the holding base and coaxially communicated with the first block hole about the first latitudinal axis (Y); and a second block hole transversely formed in the holding base about a second latitudinal axis (Z) perpendicular to the first latitudinal axis (Y) to be perpendicularly intersected with the first block hole; 
 said driving bolt including: a bolt shank portion, a screw portion having male threads formed thereon and formed on a distal end of the shank portion to be engageable with the screw hole formed in the holding base, a handle formed on a proximal end of the shank portion, and a neck portion annularly recessed in the shank portion adjacent to the handle portion; 
 said thrusting block including: a sleeve member slidably engageable with the first block hole formed in the holding base, a bolt hole longitudinally formed through the sleeve member and rotatably engageable with the shank portion of the driving bolt, a screw rotatably formed in a screw hole transversely formed through the sleeve member and engageable with the neck portion of the driving bolt for rotatably coupling the driving bolt with the thrusting block, a driving slope surface formed on a side surface of the sleeve member and tapered inwardly towards the first latitudinal axis (Y), a first elongate slot formed in the sleeve member parallel to the first latitudinal axis (Y), and a first limiting screw secured in the holding base and slidably engageable with the first elongate slot for preventing an axial rotation of the sleeve member about the first latitudinal axis (Y); and 
 said follower block engaging in said second block hole in said holding base and including: a follower wedge face formed on a first end portion of the follower block to be tangentially engageable with the driving wedge face of the thrusting block, a recess portion recessed in a second end portion of the follower block opposite to the follower wedge face in order to interfere in a rod surface circumferentially formed on the rod, a second elongate slot formed in the follower block parallel to the second latitudinal axis (Z), and a second limiting screw secured in the holding base and slidably engageable with the second elongate slot for preventing an axial rotation of the follower block about the second latitudinal axis (Z); whereby upon rotation of the driving bolt for driving the thrusting block inwardly in said base, said follower block will be thrusted to interfere in the rod for firmly fastening the rod in the holding base. 
 
     
     
       2. A fastening means according to  claim 1 , wherein said recess portion of said follower block is formed as an arcuate shape in order to be well engaged with a cylindrical rod surface of the rod. 
     
     
       3. A fastening means according to  claim 1 , wherein said recess portion further includes a packing layer formed on the recess portion to increase a frictional contact with the rod surface of the rod for firmly fastening the rod. 
     
     
       4. A fastening means according to  claim 1 , wherein said driving bolt includes said cylindrical shank portion annularly formed with a neck portion in said shank portion to be rotatably limited by a limiting screw inserted through the holding base. 
     
     
       5. A lifting mechanism according to  claim 1 , wherein said turning handle to make vertical rack upward to provide lifting force, and said rack and pinion system locked to resist the forces which tend to downward. 
     
     
       6. A lifting mechanism according to  claim 1 , wherein said the rack slider further comprising a fastening means to secure the rack slider on the horizontal arm. 
     
     
       7. A lifting apparatus of surgery comprising:
 a vertical post; 
 a horizontal arm; 
 a rack slider; and 
 a vertical rack; 
 said vertical post with one end to be mounted on a surgical table and the other end to be slid on and pivoted by the horizontal arm; 
 said horizontal arm including a hole, a shaft and a fastening means, wherein the hole of the horizontal arm can slide and pivot on the vertical post, the shaft of the horizontal arm can be slid on by the rack slider and the fastening means of the horizontal arm can secure the horizontal arm on the vertical post; 
 said rack slider including a hole, and a lifting mechanism, wherein the hole of the rack slider can slide on the shaft of the horizontal arm and the lifting mechanism of the rack slider can engage with the vertical rack, said lifting mechanism comprising a handle, a pivot, two extending pins, a disc, a pinion hole and a rack slot, said handle mounted on one end of the pivot to be rotated by handle, two extending pins on the other end of pivot, which spaced at a proper distance and attached to the disc, to engage with the vertical rack, whereby upon rotating handle to engage extending pins with the vertical rack to form a rack and pinion system; and 
 said vertical rack including a rack and an adaptor, wherein the rack of the vertical rack can engage with the lifting mechanism of the rack slider and the adaptor of the vertical rack can couple with an instrument; 
 
       whereby clamping the vertical post on the surgical table, sliding and securing the horizontal arm on the vertical post to desired position, sliding the rack slider on the horizontal arm to desired position above a patient's abdominal wall, engaging the rack slider with the vertical rack, and raising the vertical rack to provide lifting by turning the handle of the lifting mechanism on the rack slider; 
       wherein said fasten means comprising:
 a holding base; 
 a thrusting bolt; and 
 a pressing block; 
 said holding base including: a rod hole, a cam hole and a bolt hole, wherein the rod hole longitudinally formed in the holding base defining a longitudinal axis at a center of the rod hole and slidably or rotatably engageable with the rod, a cam hole transversely formed in the holding base about a latitudinal axis defined at a center of the bolt hole and projectively perpendicular to the longitudinal axis, and a bolt hole formed in the holding base having a diameter smaller than that of the cam hole and coaxially communicated with the cam hole about the latitudinal axis; 
 said thrusting bolt including: a handle, a cylindrical shank portion and a screw portion, wherein the cylindrical shank portion connected with the handle and rotatably engageable with the cam hole in the holding base, a cam portion formed on an inner end portion of the shank portion having at least a thrusting sloping portion concentrically formed on the cam portion for operatively engaging and propelling the pressing block inwardly for fastening the rod between the holding base and the pressing block, and a screw portion having male threads formed on the screw portion and engaging with the bolt hole formed in the holding base, with the screw portion protruding inwardly from the shank portion to pass through the pressing block to be engaged with the bolt hole in the holding base; 
 said pressing block including: a central hole, at least a follower sloping portion, a recess portion and a groove, wherein the central hole formed through the pressing block for passing the screw portion of the thrusting bolt through the central hole, the follower sloping portion concentrically formed on an outer end portion of the pressing block to be tangentially engaged with and inwardly propelled by the thrusting sloping portion formed on the thrusting bolt, a recess portion arcuately recessed in an inner end portion of the pressing block opposite to the follower sloping portion and engageable with a cylindrical surface of the rod in order to interfere in and to firmly fasten the rod between the block and the holding base, the groove longitudinally recessed in a side portion of the pressing block and slidably engaging with a guiding screw inserted through the holding base for longitudinally guiding a reciprocal movement of the pressing block in the bolt hole when driven by the thrusting bolt. 
 
     
     
       8. A fastening means according to  claim 7 , wherein said pressing block further includes: a socket recessed in an inner central portion of the pressing block to be coaxially aligned with the central hole of the pressing block for retaining a restoring spring in between the socket and a seat portion formed in the holding base for tensioning the pressing block to be resiliently coupled with the thrusting bolt. 
     
     
       9. A lifting mechanism according to  claim 7 , wherein said the rack slider further comprising a fastening means to secure the rack slider on the horizontal arm. 
     
     
       10. A lifting mechanism according to  claim 7 , wherein said turning handle to make vertical rack upward to provide lifting force, and said rack and pinion system locked to resist the forces which tend to downward.